What type of immunity occurs when a person has an infectious, communicable disease like measles? a....

What type of immunity occurs when a person has an infectious, communicable disease like measles?
a. Adaptive immunity
b. Passive natural immunity
c. Active natural immunity
d. Active artificial immune

Expert Solution

c.Active natural immunity.

Active natural immunity occurs when a person is exposed to a live pathogen and develops a primary immune response, which leads to immunological memory. This type of immunity is "natural" because deliberate exposure does not induce it.

Adaptive immunity is a group of specific second-line defense responses that occur days to weeks after exposure to microbial antigens during the innate immune response at barrier systems provided by skin or mucosae and is primarily mediated by T- and B-cells.

Maternal passive immunity is a type of passive natural immunity, and refers to antibody-mediated immunity conveyed to a fetus by its mother during pregnancy. Maternal antibodies (MatAb) are passed through the placenta to the fetus by an FcRn receptor on placental cells.

Active artificial immunity can be induced by a vaccine, a substance that contains antigen. A vaccine stimulates a primary response against the antigen without causing symptoms of the disease.

Nightingale answered 2 years ago

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